Malicious PDF — malware analysis report

Static analysis result for SHA-256 95582d73056ad5d2…

MALICIOUS

PDF

69.6 KB Created: 2020-12-23 09:24:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 83456d5fbccb242acc1de63b26e29516 SHA-1: b97fd1d7b09b23c47f9f6d90c7bb934ebf2c6d87 SHA-256: 95582d73056ad5d2e6c4b252454e8f927a688d741472da0991c9dd3c1c55f9c7
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple embedded links, with one specifically pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of links to disposable hosting and the use of UTM parameters suggest a phishing or malware distribution campaign. No scripts were extracted, but the document's structure and embedded URLs are sufficient indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffking.ru/123?utm_term=caixa+de+passaros+resumo In PDF document text
    • https://cdn-cms.f-static.net/uploads/4500201/normal_5fdb0e24c3bc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392199/normal_5f972bf62b65e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401711/normal_5f9aed064ff40.pdfIn PDF document text
    • https://pelefazefipaguj.weebly.com/uploads/1/3/4/8/134892892/2755190.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390323/normal_5fc540769c9ee.pdfIn PDF document text
    • https://falogumirej.weebly.com/uploads/1/3/4/3/134368081/renuwurem-kezefinulivanu-xizejujujuvosax-wizixemovunob.pdfIn PDF document text
    • https://kirenokasanav.weebly.com/uploads/1/3/4/4/134445236/9657bd34142.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383687/normal_5fba42d9de271.pdfIn PDF document text
    • https://vubedokixe.weebly.com/uploads/1/3/4/7/134716192/0cd532687ad9c.pdfIn PDF document text
    • https://zorisurirumu.weebly.com/uploads/1/3/4/6/134600588/3577856.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d621d89c-aef2-4209-af36-9ecad48d4e20/35942564658.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/rakituraridebixed.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C7 5048 bytes
SHA-256: 5c543040a34e782b1036d3c4cc6c400c0598277dffbfc1fea55e7ad47448ab5b
font_01_sfnt_off0000e3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D9 12340 bytes
SHA-256: 2c318865db9fea8a0a95f89afd397d733c577f303a1f8ec898d0e280f44e4d38

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